Within the recruited (EpCAM−) immune cell populations, IL-22 production has often been attributed to a population of TCD4+, so we examined VACV infection and IL-22 production in γδ TCR− lymphocyte populations (Figure 8H) and compared this to infection of, and IL-22 production by, recruited γδ T cells (Figure 8I). This evidence concerns the gene IL22 and infection.